The small British crowd roared themselves hoarse, waving their Union Jacks.一小群英国人挥舞着国旗，吼得嗓子都沙哑了。Hydraulic jacks under the machine produce the movement.是机器下面的液压千斤顶造成的移动.The front end is equipped with hydraulic jacks used ...
The front end is equipped with hydraulic jacks used for grade adjustment.前瑞安装有液压千斤顶用来调整坡度.Mechanical Jacks System : Four - beamtwo - pillar frame, main cylinder, pneumatic components, two - way and straight - line guider...